How to determine the degree of wheel wear on supermarket carts?

To determine wheel wear on supermarket carts, inspect the wheels based on appearance, function, and details. Promptly detect and replace any issues to ensure safe and enjoyable use:

I. Appearance Observation

Wheel Surface Wear: Uniform indentations exceeding 1mm, localized chipping or cracking, or fuzzing, cracking, or chipping indicate severe wear.

Deformation and Eccentricity: If the wheel is noticeably wobbly, out of round, or eccentric when you lift the cart and rotate it, it indicates internal structural damage, which can easily cause the cart to jam or veer.

Stain: Accumulation of oil, dirt, and sand in the gaps between the wheels may indicate aging. Discoloration or brittleness on the surface indicates corrosion and requires replacement.

II. Functional Testing

Pushing Resistance: If pushing on a flat surface is difficult or makes unusual noises, it may indicate wheel axle binding or increased wheel friction.

Steering Flexibility: If a universal wheel sways awkwardly, cannot return to center, or "locks," it is usually due to bearing damage or uneven wheel wear.

Load-bearing stability: If the wheel sinks, tilts, or makes unusual noises when fully loaded, it indicates reduced load-bearing capacity and poses a safety hazard.

III. Detailed Inspection

Loose axle: Manually shake the wheel. If there is noticeable play, rust, or grooves, replace it promptly.

Brake function (if available): If the rear wheel still turns after braking or the pedal is loose, check the fit between the wheel and the brake pad.

IV. Treatment Recommendations

Minor wear (minor scratches, normal function): Clean and observe, and do not replace for now.

Moderate wear (local dents, slight sticking when pushing): Plan to replace, and limit use to light loads.

Severe wear (deformation, unusual noises, tilting under load): Immediately remove from service and replace.

Supermarkets are recommended to establish a weekly inspection system, focusing on high-use areas (such as fresh produce and storage areas). Through "inspection, testing, and inspection," they can quickly assess the wear condition and ensure the safe and smooth use of the trolley.